During the early phase of the coronavirus disease 2019 (COVID-19) pandemic, design,
development, validation, verification and implementation of diagnostic tests were actively …

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the etiologic agent of
coronavirus disease 2019 (COVID-19), has spread globally in a few short months …

Importance Crowded indoor environments, such as households, are high-risk settings for the
transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Objectives …

Background There is disagreement about the level of asymptomatic severe acute respiratory
syndrome coronavirus 2 (SARS-CoV-2) infection. We conducted a living systematic review …

Background There is limited information on the effect of age on the transmission of SARS-
CoV-2 infection in different settings. Methods We reviewed published studies/data on …

Background Clinical trials of treatments for coronavirus disease 2019 (Covid-19) have not
shown a significant benefit of postexposure prophylaxis. Methods We conducted a phase 2 …

Importance A previous systematic review and meta-analysis of household transmission of
SARS-CoV-2 that summarized 54 published studies through October 19, 2020, found an …

As countries in Europe gradually relaxed lockdown restrictions after the first wave, test–trace–
isolate strategies became critical to maintain the incidence of coronavirus disease 2019 …

Background The proportion of asymptomatic carriers and transmission risk factors of severe
acute respiratory syndrome coronavirus 2 (SARS-CoV-2) among household and non …

(SARS-CoV-2) pandemic has brought renewed urgency to the question of what constitutes
an aerosolgenerating procedure. Public health agencies have long noted that certain …